弟子 (dìzǐ) refers to a disciple or follower of a master, teacher, or philosophy (e.g. Confucius's disciples). It is used for learning teachings or a belief system, while 徒弟 (túdì) is an apprentice learning a practical trade or craft. 传人 (chuánrén) emphasizes being a successor who continues the tradition, often after the master.